Koichi (Ryo Kase) is a son in the Suzuki family. He is a hikikomori and dies suddenly. The rest of Suzuki family, father Yukio (Ittoku Kishibe), mother Yuko (Hideko Hara) and daughter Fumi (Mai Kiryu), fall into confusion. Especially the mother Yuko, who is shocked by her son's death, and loses her memory. Fumi lies to her mother and tells her "Koichi stopped being a hikikomori and now works in Argentina."